Dilian Georgiev

Dilian Georgiev
Plovdiv University "Paisii Hilendarski" · Department of Ecology and Environmental Protection

PhD, DSc

About

333
Publications
79,560
Reads
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1,676
Citations
Citations since 2016
161 Research Items
1131 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Additional affiliations
November 2003 - present
Plovdiv University "Paisii Hilendarski"
Position
  • Professor (Associate)
November 2003 - present
Plovdiv University "Paisii Hilendarski"
Position
  • Professor (Associate)
Education
January 2005 - August 2008

Publications

Publications (333)
Article
Full-text available
New investigations of freshwater habitats in mountainous regions and caves revealed six new species of the Rissooidea in Bulgaria. The new species are described here and photos of the holotypes are provided. In addition we added photos of the type localities. An identification key of the genera of the Rissooidea of Bulgaria gives an overview of the...
Article
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strong>Abstract Our study was carried out in the south of Bulgaria, providing original data on the size of the marsh frog Pelophylax ridibundus (Pallas, 1771) in otter Lutra lutra (Linnaeus, 1758) diet. A method was devised for estimating the size of these anurans found as bone remains in otter spraints. A very strong positive correlation between...
Article
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Bear bones were reported for first time in four Bulgarian caves: Mazata (near Hristo Danovo village, Stara Planina Mnt.) - Ursus cf ingressus, Ursus sp., Kokalenata (near Bulgarka hut, Stara Planina Mnt.) - Ursus cf ingressus, Kiliykite (near Stanchov Han village, Stara Planina Mnt.) - Ursus sp. and Vodnata Modarska (near the Lilkovo village, Weste...
Article
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Localities of 15 snail species are reported (1 freshwater and 14 terrestrial) in South Coastal Kenya. Most of the species were widely distributed considering previous literature sources, with an exception of Taylo ria (Mac ro g o naxis) quadrilate ralis (Preston, 1910).
Article
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Historia naturalis bulgarica 44 (10): 125-128 ISSN 2603-3186 (online) | ISSN 0205-3640 (print) · nmnhs.com/historia-naturalis-bulgarica https://doi. Abstract: The second known species of the genus Microstygia Georgiev et Glöer, 2015 was described, Microstygia lakatnika n. sp. It was found as empty shells in the deposits of the temporary stream of t...
Article
Illumination at night is determined by moon phase, naturally affecting the reproductive activities of nocturnal animals. The European badger (Meles meles Linnaeus, 1758) is a large-sized mustelid that lives throughout Bulgaria. Since information on its reproductive activity is scarce for the country, a two-year camera trap survey was conducted at f...
Article
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We present a list with 131 terrestrial gastropod species considered to occur in the area with 18 species being new records. The new records are: Carychium tridentatum (Ellobiidae), Vertigo antivertigo, V. pusilla (Vertiginidae), Vallonia costata, V. enniensis (Valloniidae), Cecilioides acicula (Ferussaciidae), Discus rotundatus (Discidae), Aegopine...
Article
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After this study a total of 33 species of psocids are known to occur in Strandzha Mts and its adjacent Black Sea coastal area. The paper reports of 25 species as already published for the area with eight new species records. All psocids were found in or at the edge of forests or scrubs with scattered trees, dominated mainly by Quercus or Pinus spec...
Article
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A total of 18 transects near rivers and streams of different sizes in the area of "Strandzha" Nature Park were studied. The otter was found out in 92% of the studied transects of optimal habitats. It can be assumed that the total number of otters in "Strandzha" Nature Park is 60-70 individuals.
Article
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Six species of freshwater snails were newly recorded to the area of Strandzha Mts (Bulgaria): Acroloxus lacustris, Anisus spirorbis, Aplexa hypnorum, Planorbarius corneus, Gyraulus albus, and G. laevis. An updated check list was provided for this area containing a total of 27 species. The sum of the Palearctic and Holarctic species is highest in nu...
Article
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Four new Psocoptera species were described as new to science from the coastal area of East Africa: Echinopsocus keniensis n. sp., Cerobasis lienhardi n. sp., Lithoseopsis juliani n. sp. (Kenya), and Mepleres gurusamyi n. sp. (Zanzibar). One Nanopsocus species was found only in a nymph stage, and was supposed to be representative of an unknown speci...
Article
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The aim of this study was to assess the status of aquatic invasive alien species (IAS) in the shoreline zone of the Bulgarian sector of the Danube River, Danube tributaries, and adjacent standing water bodies in the frame of the Joint Danube Survey 4 (JDS4). Seven benthic macroinvertebrates and seven fish IAS were identified. The crayfish Faxonius...
Article
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A new species of the genus Bythinella is described. Its type locality is: SouthWest Bulgaria, Belasitsa Mountains, Leshnishki Waterfall, northern slope of Kongur Peak. Because of its locality position it was compared and with Greek and Macedonian species.
Article
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The leaf beetle Cassida seraphina Ménétries, 1836 is recorded for the first time from central Bulgaria based on photographic evidence. The published distribution so far is reviewed.
Article
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New information on the species diversity of Psocoptera (Insecta) of East Sub-Saharan Africa was presented. The check list of Kenya was updated with 28 species records, Zanzibar with 2 (and 3 corrected), and South Africa with 3.
Article
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. In terms of the biodiversity monitoring and conservation, localities of 9 species of reptiles, 26 species of birds, and 9 species of mammals were reported for the coastal area of Kenya (a stripe of about 20 km between the small river of Congo and the harbour to Chale Island).
Article
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A new species of Thylacella was collected from Unguja Island (Zanzibar, Tanzania) and described in this paper. A simple identification key is also proposed for all the species known from Africa and Madagascar. Now from this genus a total of 19 recent and two fossil species are known.
Article
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This paper provides both, a literature synopsis and new data on the mammalian carnivores in Sredna Gora Mts, Bulgaria. Among the seven methods used for collecting the data, camera trapping was the main one. A total of 10 species were registered, and 3 were assumed to occur in the area.
Data
If useful for someone, I tried to organize my publications till now. I also included and authorship and co-authorship of taxa.
Article
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Four Psocoptera species are reported as new records for Bulgaria: Valenzuela corsicus (Kolbe, 1882) (Ihtimanska Sredna Gora Mts), Reuterella helvimacula (Enderlein, 1901) (Rila Mts), Mesopsocus helveticus Lienhard, 1977 and Hyalopsocus contrarius (Reuter, 1893) (both from Sakar Mts). After this article there are a total of 71 psocid species known f...
Article
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Historia naturalis bulgarica 44 (1): 5-8 ISSN 2603-3186 (online) | ISSN 0205-3640 (print) · nmnhs.com/historia-naturalis-bulgarica https://doi. Abstract: A new species of the genus Devetakia, Devetakia apostoloui n. sp., is described from Vucha River, South Bulgaria. The new species is the first member of the genus and the first species from ancien...
Article
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A new collection of Psocoptera from Samothraki Island revealed 6 species. Four of them were new records for this area. After this study the current list of barklice of the island is comprised of 13 species.
Article
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The available data from literature sources and collected material on the spreading of Ixodid ticks in Sarnena Sredna Gora Mountains are presented. A total of 13 species of 6 genera are reported (Hyalomma marginatum (Koch 1844), Hyalomma scupense (Schulze 1919), Rhipicephalus bursa (Canestrini et Fanzago 1877), Rhipicephalus sanguineus (Latreille 18...
Article
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Infestation of the road-killed hedgehogs (Erinaceus roumanicus) with Ixodes ticks in some parts of Upper Thracian Plain (Bulgaria) was investigated. A total of 5 tick species from 3 genera were identified.
Preprint
Full-text available
Infestation of the road-killed hedgehogs (Erinaceus roumanicus) with Ixodes ticks in some parts of Upper Thracian Plain (Bulgaria) was investigated. A total of 5 tick species from 3 genera were identified.
Article
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A total of six species of Psocoptera were collected from Egypt (Cairo city – 5 species, Hurghada city – 1 species). Three of them were new records for Egypt.
Article
Abstract. A new species of the genus Bythinella, Bythinella vidinovae sp. nov., is described from a tributary of the Sandanska Bistritsa river, Pirin Mountains, south-western Bulgaria. The new species is an interesting case of a rheophilic species known only from the type locality.
Data
List of the molluscs (Mollusca: Gastropoda & Bivalvia) (terrestrial, freshwater and marine) registered in Bulgaria till 2021.
Article
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We present the results of our short survey for Psocoptera at the region of Pieria, North Greece. A total of 15 specimens were collected, belonging to 9 species.
Article
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A total of 29 species were registered at the territory of Smolyan Town. Three species were new records to West Rhodopes Mts: Pupilla muscorum (Linnaeus, 1758), Tandonia budapestensis (Hazay, 1881), and Arion sp. from the lusitanicus/ rufus complex.
Article
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Three species were added to the list of Psocoptera of Unguja, and one was excluded. A revision of the materials mentioned by Georgiev (2021) revealed two species as new records to the island, and one which was previously misidentified was now corrected. These were Liposcelis puber, L. plesiopuber and Stenocaecilius casarum. All were new records for...
Data
This resource contains spatial data about classical localities of endemic taxa of terrestrial Mollusca from the Western Balkans. Data were compiled within the List of Selected Endemic Terrestrial Plant and Animal Taxa of South-East Europe. Support for developing this list was provided by the Open Regional Fund for South-East Europe – Biodiversity (...
Article
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In the present article, we summarised all known information on the species Soosia diodonta (A. Ferussac, 1821) from Bulgaria. A new locality in urban environment, photos of live animals and the reproductive system of the species are given. New information on its ecology and biology is provided.
Article
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A total of 47 active badger burrows in the Southeastern Bulgaria were described in order to find whether there are preferences to terrain exposure for its digging activity. The most of the dens were found on terrain with south exposure-23.4%, followed by these on the east and west side-19.15% each. The dens faced to these three directions, together...
Article
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Four species of Campodeidae have been recorded from Sarnena Gora Mts. region from which Campodea (Dicampa) caucasica Rusek, 1965 and Campodea (Campodea) magna Ionescu, 1955 are new records to the fauna of Bulgaria.
Article
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. Annual harvest hunting data and counting statistics from 2009 to 2019 were used as methods for assessing changes in four Artiodactyla species population trends. The study area covers approximately 100,000 ha territory from Sredna Gora Mts. The results showed trend for a stable increase in the Red Deer population, because of provided conservation...
Article
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During a brief malacological survey, a total of 16 snail species were recorded (four mangrove amphibious, 12 terrestrial). For all the species new localities with GPS coordinates and habitat data are provided. The species Thapsia insulsa Preston, 1910 (Urocyclidae) is a new record to the island.
Article
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This case study presents new distribution data on 37 vertebrate species (1 fish, 4 lizards, 1 snake, 3 mammals, and 28 birds). All were registered at the area of North-West coast of Michamwi Peninsula.
Article
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A total of 28 species of 13 families were registered. All species recorded were new records to the Zanzibar autonomous region, ten to Tanzania, eight to East Africa and two (Lepidopsocus pretiosus (Banks, 1942) and Belaphopsocus murphyi Lienhard, 1991) were new to the entire African continent. Original photos of 22 of the found species were provide...
Article
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Altogether 12 species from six Diptera families are presented in this paper. The species Lipoptena fortisetosa Maa, 1965 and Euthera fascipennis (Loew, 1854) are new records to Bulgaria.
Article
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The species Lehmannia horezia Grosu et Lupu, 1962, Lehmannia nyctelia (Bourguiguat, 1861) and Oxychilus (Riedelius) depressus (Sterki, 1880) were newly recorded to Sarnena Gora Mts. After this report the known list of molluscs of this area consists of 112 species.
Article
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A total of 9 species were reported from three geographic areas of South-West Bulgaria (Kresna Gorge, Kozhuh Mt., and Ograzhden Mts.): Liposcelis bostrychophila, L. decolor, L. silvarum, Lachesilla pedicularia, L. bernardi, E. annulatus, E. moebiusi, Amphigerontia contaminata, and Neopsocus rhenanus
Article
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The study was carried out between 17.8.2020 and 22.8.2020 on Thassos Island during a short vacation. A total of 13 species were collected from 9 localities. The species Liposcelis silvarum (Kolbe, 1888) is a new record to the fauna of Greece. Considering the relatively rich variety of habitats on Thassos, it can be concluded that its Psocoptera fau...
Article
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A total of 23 individual illegal dumps were located at the 5x5 km sample area around the villages of Hrishteni and Kolena. About ¼ of them were situated near the Medven Hill, bordering with some agricultural lands. Their surface area can be spotted even on satellite images. Even the studied area is small it represents the real situation not only in...
Data
Actual list of Mollusca known from Bulgaria till December 2020.
Article
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uction The moths of Sarnena Gora Mts are not studied in detail. Some species records were published by Nedyalkov (1909) for Stara Zagora, and by Tuleshkov (1965), mainly for the area of Stara Zagora City and Starozagorski Mineralni Bani Resort. Data for some new and rare for Bulgaria species, collected near Buzovgrad Village are presented in the ar...
Article
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A recent field work carried out by Dilian Georgiev revealed four samples with three hydrobiid species. These species have been misidentified by Clessin (1890), Angelov (1950), and Reischütz (1983). Re-examination of these species provided two Grossuana spp. and one Bythinella sp., all new for science. In addition the samples of syntypes of Bythinel...
Article
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Two species of Psocoptera (Insecta) are reported as new to the Bulgarian fauna: Philotarsus parviceps (Philotar-sidae) and Loensia fasciata (Psocidae). After this publication, the list of known barkfly species in the country contains a total of 67 species. A checklist is provided with references to the original records.
Article
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Five mollusc species were recorded on Thassos Island as new for the fauna of the island: Four gastropods (Aegopinella minor, Carychium minimum, Deroceras thersites, Limax graecus), and one clam (Pisidium personatum). Now the number of species recorded on the island is 83. This is one of the richest island malacofaunas of Greece.
Article
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The study was carried out between 20.8.2018-25.8.2018 and 22.7.2020-28.7.2020 on the Elafonisos Island (South Peloponnesus, Greece). Fifteen localities were surveyed and 32 species of terrestrial snails were found. Most interesting are the findings of Trochoidea trochoides (very rare in Greece) and of Vitrea argolica and Xeromunda vulgarissima (the...
Article
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A total of 44 mollusc species was recorded during a one day study of the area. The main part of the material came from river deposits of the Matnitsa River near the village of Petrelik.
Article
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The material was collected between 2017 and 2020 during all seasons. Following methods were used: 1. Actively searched in proper habitats, and collected by wet brush; 2. Sieving with 1 mm mesh width sieve of detritus or crushed tree bark particles above white plastic container; 3. Beating the vegetation above white plastic container; 4. Checking fo...
Article
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The study was carried out between 15.5.2018 and 8.8.2019 in various regions of N continental Greece. A total of 16 species were collected from 11 localities. The Psocoptera fauna of N Greece is still not well studied and future investigations are needed.
Article
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In 2019 a strikingly colored species of Liposcelis (Insecta: Psocoptera: Liposcelididae), unknown from the Palaearctic region, was collected by A. Ostrovsky in an ant's nest near Gomel city (Belarus). It is here described as Liposcelis aleksandrowiczi n. sp., a bisexual sister species to the parthenogenetic (thelytokous) New World Liposcelis ornata...
Article
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The Psocoptera fauna of Belarus is not well studied (Lienhard & Smithers 2002, Lienhard 2016). In this short note we report six species from this insect order as new records to the country. Three species of the apterous genus Liposcelis were not only found in domestic situations but also in ant nests. The psocid fauna of ant nests is in general poo...
Article
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Six species of Protura, Acerentulus bulgaricus, Acerentulus exiguus, Acerentulus xerophilus, Acerella muscorum, Eosentomon longisquamum and Eosentomon zodion, were collected from Sarnena Gora Mountains. The species Acerentulus exiguus, Acerentulus xerophilus, Eosentomon longisquamum, Eosentomon zodion and recently described Acerentulus bulgaricus,...
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Four species of Mecoptera and four species of Dermaptera were collected from Sarnena Gora Mts. Second record of Panorpa vulgaris in Bulgaria is reported.
Article
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All literature data was surveyed and critically reviewed. The new materials were collected as sieved soil and detritus samples, or by hand. A total of 109 mollusc species are known to occur in Sarnena Gora Mts. Eight were new records to the area.
Article
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There is no previously published data on tardigrades found in Sarnena Gora region. During the study period a total of 13 samples were collected. Specimens from genera Echiniscus C.A.S. Schultze, 1840, Milnesium Doyère, 1840, Isohypsibius Thulin, 1928, Ramazzottius Binda & Pilato, 1986, Adropion Pilato, 1987 and family Macrobiotidae Thulin, 1928 wer...
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A short literature review on the vegetation associations and the habitats of Sarnena Gora was done.
Article
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Diplura is a group of entognathous hexapods, often considered a sister group to insects. They play an important role in recycling organic matter in soil and subterranean terrestrial ecosystems. The Campodeidae is the most diverse family, divided into four subfamilies. The subfamily Plusiocampinae has a subterranean life-style with many species dist...
Article
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The first records of Sylvicola cinctus (Fabricius, 1787) from Albania and Croatia, S. fuscatus (Fabricius, 1775) from Croatia and Ukraine, S. stackelbergi Krivosheina et Menzel, 1998 from Romania, and the second record of S. fenestralis (Scopoli, 1763) from France are presented. Several other records are briefly discussed.
Article
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This study was carried out simultaneously with a fish parasitological studies of the first author. Six gastropod species (5 freshwater and 1 hygrophilоus terrestrial one) and three mussel species were identified in this case study. Five of the gastropods and two mussel species are first records from Manyas Lake. Although Manyas Lake is a Ramsar are...
Article
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The study was carried out on the following dates-15.6.2019 and 17.6.2019 in NW Bulgaria (Danube River Valley) from three localities: villages of Vrav and Simeonovo, and town of Kozloduy. Five widely distributed species of Psocoptera were registered: Valenzuela flavidus (Stephens, 1836), Graphopsocus cruciatus (Linnaeus, 1768), Lachesilla pediculari...
Article
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A new species, Acerentulus bulgaricussp. nov ., belonging to the confinis group, is described from Bulgaria. This species is characterized by long foretarsal sensilla a and b , the posterior position of foretarsal seta δ 4 , the presence of seta P1a on abdominal tergites II–VII and seta P3a on abdominal tergite VII, possession of eight anterior set...
Article
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The study was carried out during a short vacation, between 24.7.2019 and 27.7.2019 on Ammouliani Island (Chalkidiki Peninsula, Greece). The survey revealed a total of 9 species of Psocoptera on the island and the very first data on this insect group on the whole Chalkidiki. Further research is needed to clear the actual diversity of the Psocoptera...
Chapter
The current review presents the composition, distribution, zoogeographical characteristics, some ecological traits, and conservation status of the mollusc fauna (Gastropoda and Bivalvia) in the Bulgarian sector of the Danube River and the adjacent marshes and backwaters. A total of 67 mollusc species (47 gastropods and 20 bivalves), about 13% of th...
Article
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The specimens used to eat 17 grass species from all 44 species offered (38.6% from all). They refused to eat all 3 liana and 21 tree species and eat only leafs of Paliurus spina-christi from the offered bushes. Contrary they eat most of the fruits, vegetables and animal food. Hanging on the tips of the soles from the top of terrarium was observed d...
Article
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All the information on the animal species diversity of the Vrachanski Balkan Nature Park included in first and second parts of this issue was summarized. A total of 2290 species from Vrachanski Balkan Nature Park and some more 81 species from the region of Vrachanska Planina Mts., out of the park borders are recorded. From all, 348 are new records...